Thread: TrailBoss

Originally Posted by akaroa1

Trailboss has its uses and I have 1 kg tucked away, so not likely to run out in this lifetime.

It does have similar pressure to BP in straight walled cases ( and I accept the above likes and dislikes ).

BUT it generates that pressure in a much shorter cycle.
Meaning the same pressure in half the amount of time.
So this raises some very real concerns for guys like me who only shoot genuine original vintage rifles.
It's just fine in a repop rifle.

And mostly fine in an original.
But you do need to be cautious about the metallurgy and inherent strength of the action you are using it in if it's original.

The bulk of the powder (which is desirable in low-grain loads) has the consequence of a lot of surface area so it burns fast. Steep pressure curve from that... The velocity spread thing I have always considered to be due to the steep pressure curve and neck tension differences, once I started neck crimping the velocity differences shot-shot basically went away. One of the things with loading subs and using Trailboss is that you never worry about annealing etc - and I think this can give you enough of a difference in neck tension to show the velocity spreads without the crimps.

I managed to pick up a full bottle of Trailboss a few weeks back - at 9.5g per load that will likely see me out. Hopefully we do start seeing it being made at ADI again, but as it basically doesn't have a military application as far as I know I don't think it's going to be a huge priority for them. The other issue is ADI is labelling their product as Class 1.4 still where NZ wants it labelled as Class 1.3 for transport purposes which is going to make it difficult.